Abstract
An inelastic constitutive model for a class of Fabric-reinforced Composites (coated-fabrics) is obtained by extending an existing elastic model to include yarn- coating debonding and yarn-coating slippage. The processes of yarn-coating debonding, yarn-coating slippage and coating extension are modelled by an effec tive linear work-hardening coating material. To examine the predictive capability of the model a systematic procedure is developed to determine the relevant model parameters. This procedure is applied to experimental results developed from several samples of coated fabrics, and comparisons are made between experimen tal results and theoretical predictions. For all load levels and all load ratios con sidered, the model not only predicts the basic biaxial behavior, but also closely reproduces the experimentally-observed inflection points in the stress-strain curve and the higher stiffness at low loads. Furthermore, the model closely reproduces the experimentally observed unloading paths and the magnitudes of the perma nent deformations.
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